Re: [RFC 0/3] Basic support for LWP
From: Thomas Gleixner
Date: Mon Oct 04 2010 - 18:15:08 EST
On Mon, 4 Oct 2010, Hans Rosenfeld wrote:
> LWP (Light-Weight Profiling) is a new profiling mechanism that allows
> user mode processes to gather performance data about themselves with
> very low overhead. The specification can be found here:
> http://developer.amd.com/cpu/LWP/Pages/default.aspx
All I can see there is marketing blurb. The spec pdf does not tell me
either how the end result of your patches will look like.
> This code adds basic support for LWP to the context switch code, which
> is the minimum needed to use LWP. Support for other LWP features like
> interrupts will be added later.
Oh no. We are not going to merge that and give you a card blanche to
come up with another profiling/performance monitoring facility which
is completely disconnected to everything else.
Please provide either the full patch of this facility or at least a
reasonable explanation how it will look like when your code is
ready. What's the user space interface, how does it hook into perf,
etc ...
Thanks,
tglx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/